Hot water heating system



Ju'ne 25, 1935. l 'F. c. BRoDERlcK 2,005,352

I i Y HOT WATEIR HEATING' SYSTEM rma Feb.' 25. 195s mao/ER j2me/2757 Fkznemck C. Eno smc/r "il w M *www Patente-d June 25, 1935 UNITED y STATES voutta I Parleurv OFFICE Thisinvention relates to heating systems in which the heating medium such as hot water is forced through the radiation circuit by means of a pump under thermostatic control.

The purposes of the invention are to provide such a system with improvements which insure the positive shutting oi of both the supply and return conduits of the radiation circuit when the pump is not in operation, including an improved rotary pump, which acts as a valve in the supply conduit, and a two-way check valve in the return conduit, the latter providingfor lay-passing hot Water from the boiler through a water heater.

Thus, when the boiler water is not circulated through the radiator circuit it is by gravity circulation passed through a water heater. This water heater 'has separate Vconnections to a hot water storage tank, which in turn has the usual connections to the hot water supply system of the building.

The purposes of the invention are accomplished by means of an arrangement and constructions as illustrated ln the accompanying drawing, in which Y Figure 1 is a diagram ter heating system.

Fig. 2 is a longitudinal section oi' the pump and showing partly broken away the driving motor therefor.

Fig. 3 is a sectional view of the two-way check valve used in this system.

rIfhe improved heating system is designed to avoid complicated arrangements of circuit connections or equipment while providing for positive and rapid circulation of the heating medium when required, according to' thermostatic control of the system, and at other times no circulation can occur in theheating system and the hot wat'er from the boiler is then used exclusively for supplying heat to a storage-tank for hot water.

The essential equipment for this system is a boiler having supply and return conduits connected therewith, these conduits leading to the various radiators of the building but-having a cross connection through a hot water heater. This heater includes a coil or other means for receiving heat whichis in an independent circuit leading of theimproved hot wato and from the hot water storage tank. Included in theradiator circuit is af rotary pump having an operating motor which is under thermostatic control. The rotary element of the pump is a valve which automaticallyA unseats when the pump is set in operation. A two-way check valve is also included in vthe system and is responsive to the flow` of water under the action of the pump to open the return line of the heating system to I the boiler. When the pump is not in operation this check valve shifts to close Ythe radiator return conduit and open a by-.pass so that the hot water from the boiler then circulates through a 5 wager heater instead of through the radiator circui Referring to the drawing, the diagram in Fig.

1 represents room heaters for a'building by the radiator i. The hot water supply conduit 2 con- 10 nected with the boiler 3 may communicate with ther supply side of" the radiator through a T-valve 4 and conduit connections therefrom leading to pump 5 having a supply connection 6 with the radiator. The return line 'i from the radiator 15 passes through check valve 8.

A Water heater tank 9 is in a by-pass connection .I0 from the T-fltting fl to the check valve 8.

A hot water storage tank H is connected through the conduits i2 and i3 with a coil i4 in 20 the heater 9 and which receives heat from the boiler water circulating through tank 9 when the boiler water is permitted to circulate through this tank. The cold water supply for the storage receptacle il is indicated at i5 and the hot wa- 25 ter supply conduit for the building is indicated at I6.

The pump construction 5 is illustrated by Fig. 2. This pump is supported by a casting l1 including an integral bearing I8- for the pump 30 and a supporting base i9 upon which is mounted the pump motor v2l). The latter is an electric motor under control of a switch 2| in a motor circuit 22.

The switch is under the control of a. room 35 thermostat 23 in* a switch operating circuit 24 vnot illustrated in detail butwhich as customary receives low voltage from a transformer in line 22. The motor shaft 25 is coupled with a pump shaft 26 by means of a coil spring 21. The 40 pump shaft 26 carries fast a centrifugal pump impeller 28 having the radial vanes 29 integral with a valve disc 30 and hub 3|. Spring 21 isunder compression and by thrust through the shaft 26 holds the valve 30 against the seat 32 45 formed on the inner surface of the pump body l.

When the motor shaft 25 is rotated the spring 21 winds up sumciently under the kreactance of lthe load on the impeller or rotor 28 tolshift shaft 26 and the rotor carried thereby to the right. 50 Fig. 2, unseatlng valve` 30 'and permitting cir- `culation of the heating medium through the Dump.

This consteructionis a, combined motor oper-- -ated valve and pump, with the function of posi- 56 tively circulating the heating medium when required and positively `preventing circulation under a temperature diiferential when heat is not required. It is an economy in equipment over independent motor actuated valves and pumps.

The double check valve illustrated by Fig. 3 consists of a housing within which is seated a support 33 around which may oscillate an arm 34 carrying valve discs 35 and 36. When the pump is in operation the flow of water through valve 8 in the direction indicated by thev arrows causes the valve discs 35 and 36 to assume the position illustrated by Fig. 3, in which disc 36 is seated against the annular shoulder 31. When the pump is not in operation the weight of the oscillatory valve element and the gravity circulation of water from and to the boiler through the heater 9, holds the valve seated against port 38 formed in flange 39 of the valve body.

The valve disc 36 is provided with one or more perforations 40, which serve to .permit recirculation of some of the cooler returned water from the radiators when the pump is in operation. The

' hot boiler water is thus reduced in temperature to some extent before being delivered to the radiators.

In the operation of this heating system, when heat is not required in the radiators, the valve disc 35, Fig. 3 closes port 38 preventing the flow of water on the return side of the radiator system back tothe boiler, and disc 30 forming a part of the pump rotor, Fig. 2, remains on its seat, closing the radiator feed conduit. Thehot water in the boiler then circulates through conduit 2 and vdown through conduit I0 and the heater tank 9 back to the boiler. The work performed by the boiler at this time is then to heat the water circulating through coil I4 from and to the hot water storage tank I I.

When the thermostat 23 closes its circuit 24,A

switch 2| closes the motor circuit 22 and the pump is set in operation, forcing circulation through the radiator system, and thereby heating the radiators.v The flow of hot water through f the radiator system results in shifting the valve,

Fig. 3, so that it is lifted from port 38 and closes the outlet of heater 9, through which at this time there is` some reverse current, caused by the suction of the pump drawing water 11p--I wardly through the perforations 40 in disc 36. When the pump motor is in operation, vspring 21 is wound up sufliciently to unseat valve 30, but

when the room temperature is raised to such point that thermostat 23 opens the circuit 24, andthe pump motor stops, spring 21 through a thrust of shaft 26 again seats the valve` v3i), and prevents further circulation of hot water through 'the radiator system.

yit will be understood that certain details of the construction' shown may be altered or omitted i without departing from the spirit of'this invention as defined by the following claims.

I claim: 1. AIn a hot water heating system, the'combivnation with a. boiler, radiation means having sup- "ply Vand return conduits connected with said boiler, and a by-pass between said supply and reby-'pass including a water heating receptacle,

of means in one of said conduits disposed between said radiation means and said by-pass for forcing circulation of. water from the said boiler through said radiation means, a thermostat positioned to be aifected by said radiation means and arranged to control said circulating means, and a check valve positioned at the junction of said by-pass and said return conduit and arranged to be actuated by the flow of Water .from said circulating means to check the flow of boiler water through said by-pass, said circulating means having a valve element arranged to'close said one of said conduits automaticallyV and prevent gravitational circulation of boiler water to the radiation means when said circulating means is not in operation.

2. In a hot water heating system the combination with a boiler,'radiation means having supply and return conduits connected with said boiler, and a by-pass between said supplyl and return conduits located adjacent said boiler, said by-pass including a water heating receptacle, of means in said supply conduit for forcing circulation of water from said boiler through said radiation means, a thermostat positioned to be af-l fected by said radiation means and arranged to operate said circulating means, and a two-way check valve positioned atA the junction of said by-pass and said return conduit and arranged to be actuated by the flow of watervfrom said l 'circulating means to control the ilow of boiler water through said by-pass,l said check valve be- Aing arranged to prevent gravitational flow of ling a valve element arranged to close said supply conduit automatically and prevent gravitational circulation of boiler water therethrough to the radiation means when said circulating means is not in operation.

3. In a water heating system, the combination with .a boiler, a radiator having supply and return conduits connected with said boiler, and a circulating means in one of said conduits for forcing circulation of Water from said boiler through said radiator, of a by-pass including a water heater connectingsaid supply and return conduits between said circulating means and said boiler, a two-way check valve positioned at the junction of said by-pass and the return conduit arranged to normally close said return conduit' I against flow of water therethrough toward said radiator and to be actuated by the ow of water from said circulating means to open said return conduit and block the passage of water through said by-pass, and a valve normally closing said supply conduit between said by-pass and said radiator arranged to be actuated by said circulating means to open said supply conduit.

4. In a hot water heating system the combinanation with a boiler, radiation means having supply and return conduits connected with said` boiler, and a by-pass between ,said Vsupply and return conduits located adjacent said boiler, said by-pass including a water heating receptacle, and all comprising a water'lled system arranged .to permit thermal-gravitational circulation of boiler water to and from said water heating receptacle, of valve Vmeans in each of said supply and return conduits located between said by-pass and said radiation means and arranged to normally resist passage of boiler water to saidv radiation means, a thermostat positioned to be af- 2,005,852 fected by said radiation means, and means con-' trolled by said thermostatarranged to actuate said valve means to permit circulation of boiler water to and from said radiation means.

5. In a hot water heatingl system the combination with a boiler, radiation-means having supply and return conduits connected with said boiler, and a by-pass between said supply and return conduits located adjacent said boiler, said by-pass including a water heating receptacle, of valve means in said supply conduit located between said by-pass and radiation means and arranged to normally resist passage of boiler water to said radiation means, a two-way valve means located at the junction of said by-pass and the return conduit and arranged to normally close v said return conduit against flow of water there- Cal through toward said radiation means and to be shiftable to open said returnconduit and check the passage of water through said vby-pass, a thermostat positioned to be affected by said radiation means, and means controlled by said thermostat arranged to actuate both said valve means .to permit circulation of boiler water to and from said radiation means, and check the flow of water through said by-pass.'

6. In a hot Water heating system of the classv described the combination with a boiler, a radiator, a supply conduit leading from said boiler to said radiator, and a return conduit leading.

from said radiator to said boiler, all arranged in a water iilled circuit, of a water heating device associated with said boiler and arranged to receivel heat from the boiler water by thermal gravitatienal circulation thereof, a valve in said supply line arranged to normally resist circulation of boiler water to said radiator, a valve in said return line arranged to prevent passage of boiler water therethrough to said radia'tor, a thermostat positioned tobe aiected by said radiator, and means controlled by said thermostat arranged to actuate said valves to permit circulation of boiler water to and from said radiator.

.7. A hot water heating system of the class described comprising a boiler, a radiator, supply andreturn conduits between said boiler and radiator, a by-pass between said supply and return conduits located adjacent said boiler, a twoway check valve'located at the Yjunction of said by-pass and'said return line, a shiftable arm. in

said valve and a pair of Y'valve discs carried en said arm, one of said discs being arranged to normally close said return line on the side o! said valve nearest said radiator, the other of said arranged to checkvthe passage of boiler water through said by-pass upon shifting of said arm, said other disc having an aperture therethrough to permit a predetermined minimum flow of boiler water through said by-pass, a. thermostat positioned to be affected by said ra.-' diator, and means controlled by said thermostat arranged to shift said arm and valve discs to open said return line and check the flow of water through said by-pass.

8. In a hot water heating system thev combination with a boiler, radiation means having supply and return conduits connected with said boiler,a by-pass between said supply and return conduits located adjacent said boiler, said by-pass including a water heating receptacle, vof valve means in said supply conduit located between said by`pass and radiation means and arranged to normally resist passage of boilerwater to said radiation means, a two-way valve means located at the junction of said'by-pass and the return conduit. and arranged to normally close said return conduit against flow of water therethrough toward said radiation means and to be shiftable to open said return conduit and check th'e passage of water through said by-pass, saidv two-way valve means being arranged to permit a" minimum iiow of water through said by-pass when shifted to a position checking the ilow therethrough, a thermostat positioned to be affected by said radiation means, and means controlled by said thermostat arranged to actuate both said valve means to permit circulation of boiler water to and from said radiation means and check the ow of water through said by-pass.

9. A hot water heating system of the class described comprising a boiler, mradiator, a supply conduit leading from said boiler to said radiator, a lreturn conduit leading from said radiator to said boiler, a by-passconduit pipe connected between saidV supply and return conduits, a water heating receptacle in one of said conduits, means in said supply conduit arranged to resist circulation of boiler water therethrough to said radiator and located on the radiator side of the` junction o! said by-pass and supply conduits.

-means in said return conduit arranged to resist the passage of boiler water therethrough toward said radiator, said water heating receptacle `being' located on'the'boiler side of both said resistance means, a thermostat positioned to be affected by said radiator, and means controlled by said thermostat arranged to effect circulation of .boiler water to and from said radiator.

' FREDERICK c. naonnmcx: 

